needs tips for troubleshooting high error counts on a 5224

Question

I have a 5224 at the center of my network.  Has our servers and a number of other switches connected to it. Of it's 24 ports 7 ports have what I'd consider very high numbers of CRC and or fragmented packet errors in the counters. Have an additional 10 ports that have noticeable but fairly small numbers of the same kind of errors. None of the rest of the switches in my network (which includes Dell 3348, Dell 5212 and a bunch of Cisco 3524 and 2924 switches) have anywhere near this level of 'errors.' We are checking cables, updating nic drivers and in some cases upgrading nics, but this many errors on so many different ports on one switch make me wonder if there isn't a problem with the switch. So, any troubleshooting tips would be greatly appreciated. Thanks

GregG1 · Answer

You are on the right track by verifying cable integrity, and troubleshooting the NICs.

The best troubleshooting step to take in order to verify whether the problem is related to the switch would be to move one of these problematic systems to a port that does not exhibit errors and move a working system with no errors to one of the suspect ports. If the errors follow the system, then the switch would not be the source of the problem.

Jan_wood · Answer

We are experiencing similiar problems with both the 3324 and 3348 series switches.  When referencing the router, I see input errors, CRC errors and overruns on the internal interface.  The tenants at this property are also experiencing very poor upload and download speeds.  For example, I had a tenant run a speed test yesterday from DSLReports.com.  I had him run it three seperate times and the download speeds were 220k, 112k and 115k and the upload speeds were 130k, 40k and 59k.  The transmit load on the internal interface of the  router was 5/255 and the rxload was 2/255, so it was not like he was contending for bandwidth.  We are monitoring the switches through Solar Winds and the mean response time is 78ms which is quite high considering that there is only one person currently using a port on the switch  and their average transmission is approximate 0.3Mbps.  Hopefully someone will have an idea what is causing this issue for us.  We are on software version 1.1.0.42, boot version 1.0.0.13 and Hardware version 00.00.01.

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